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Finding the Fourth Proportional to 100,562.96, 138,737.19 and 64,773.71

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Solution

The fourth proportional to 100,562.96, 138,737.19 and 64,773.71 is: 89,362.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,562.96 : 138,737.19 = 64,773.71 : x
  2. Step 2: Convert to fraction form
    100,562.96/138,737.19 = 64,773.71/x
  3. Step 3: Cross multiply
    100,562.96x = 138,737.19 × 64,773.71
  4. Step 4: Simplify right side
    100,562.96x = 8,986,522,511.27
  5. Step 5: Solve for x
    x = 8,986,522,511.27/100,562.96
  6. Step 6: Final answer
    x = 89,362.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.